{"id":"CVE-2026-55185","summary":"Miniflux 2: Open Redirect Bypass","details":"Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.","aliases":["GHSA-m999-j542-5w3r","GO-2026-5500"],"modified":"2026-08-27T11:30:26.598978645Z","published":"2026-08-21T20:19:14.122Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-601"]},"references":[{"type":"WEB","url":"https://github.com/miniflux/v2/releases/tag/2.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json"},{"type":"ADVISORY","url":"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55185"},{"type":"FIX","url":"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949"},{"type":"FIX","url":"https://github.com/miniflux/v2/pull/4362"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/miniflux/v2","events":[{"introduced":"0"},{"fixed":"c896bafdaa19c3f280b02b1059f84706495f1949"},{"fixed":"9a774083ab4f61f7d604fb950bdd6aff029824a1"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"2.3.1"}]}}],"versions":["v2.3.0","2.3.0","v2.2.19","2.2.19","v2.2.18","2.2.18","v2.2.17","2.2.17","v2.2.16","2.2.16","v2.2.15","2.2.15","v2.2.14","2.2.14","v2.2.13","2.2.13","v2.2.12","2.2.12","v2.2.11","2.2.11","v2.2.10","2.2.10","2.2.9","v2.2.8","2.2.8","v2.2.7","2.2.7","2.2.6","2.2.5","2.2.4","v2.2.3","2.2.3","2.2.2","2.2.1","v2.2.0","2.2.0","2.1.4","2.1.3","v2.1.2","2.1.2","v2.1.1","2.1.1","2.1.0","v2.0.51","2.0.51","2.0.50","v2.0.49","2.0.49","2.0.48","v2.0.48","v2.0.47","2.0.47","v2.0.46","v1.0.46","2.0.46","2.0.45","2.0.44","2.0.43","2.0.42","2.0.41","2.0.40","2.0.39","2.0.38","2.0.37","2.0.36","2.0.35","2.0.34","2.0.33","2.0.32","2.0.31","2.0.30","2.0.29","2.0.28","2.0.27","2.0.26","2.0.25","2.0.24","2.0.23","2.0.22","2.0.21","2.0.20","2.0.19","2.0.18","2.0.17","2.0.16","2.0.15","2.0.14","2.0.13","2.0.12","2.0.11","2.0.10","2.0.9","2.0.8","2.0.7","2.0.6","2.0.5","2.0.4","2.0.3","2.0.2","2.0.1","2.0.0","2.0.0-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55185.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}